Welcome to FIS   Sponsored By
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us
   


Whitefin weakfish, Cynoscion albus (Photo: Ecosistemas de Costa Rica)

Whitefin weakfish in captivity managed to be bred

Click on the flag for more information about Costa Rica COSTA RICA
Thursday, September 26, 2013, 23:40 (GMT + 9)

Scientists at the Marine Biological Station Juan Bertoglia Richards, of the School of Biological Sciences at the National University (UNA), are investigating the possibility of raising whitefin weakfish (Cynoscion albus) in captivity, a resource having great commercial importance.

This white fleshed fish with a high percentage of proteins is caught in the Gulf of Nicoya, but in recent years its catches decreased so that the researchers intend to obtain specimens in captivity.

After keeping wild whitefin weakfish reproducers in captivity for more than two years, on 20 June scientists from the Culture and Breeding Laboratory of Marine Fish performed the hormonal induction of these specimens.

According to Jorge Boza Abarca, Laboratory coordinator, after waiting a latency period of about 48 hours, "both females and males released their sexual products into the water, hence achieving fertilization and for the first time obtaining fertilized eggs of the whitefin weakfish in captivity."

Boza Abarca explained that wild broodstock specimens are hard to obtain because they are caught by artisan fishermen and are exposed to great stress due to the hours during which they remain hooked on hooks before being transported to the breeding tanks.

Marvin Ramirez, one of the researchers involved in the project, explained that for more than 24 months they took care of eight reproducers - females and males - a task which, he said, demanded a great effort.

To Boza Abarca, achieving the reproduction of whitefin weakfish specimens in captivity is the first step in the development of mariculture in the Gulf of Nicoya, UNA reported.

"From the fertilization phase, what we want to study is the life cycle of the species, to see how much it grows in a year and what size it will reach when mature," Ramirez added.

The researchers plan to install a cage in the fishing area in Chira Island to assess the growth of the fish in order to devise a mariculture project, the newspaper La Nacion reported.

Scientists explain that as a result of the fishing pressure, the sizes to spawn changed from 70 cm to 50 cm, and "as they were smaller fish, the eggs have lower quality," the biologist noted.

The project's backers think about the possibility of releasing fish in the Gulf to help recovery. They also consider the possibility of marking them with microchips to track them.

By Analia Murias
[email protected]
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Canada
Oct 26, 15:00 (GMT + 9):
Yukon legislature passes motion to support Mi’kmaw fishery
United States
Oct 26, 09:00 (GMT + 9):
Alaska scientists doing first studies on Ocean Acidification impacts to salmon, following research done out of state
Colombia
Oct 26, 06:00 (GMT + 9):
The Goliath grouper (Epinephelus itajara) reproduction cycle has been closed in Cartagena waters
Japan
Oct 26, 00:00 (GMT + 9):
Statistics │ Import Food products from the world │ 2014-20
Japan
Oct 26, 00:00 (GMT + 9):
Statistics │ Imports by Origin│ Fish and Shellfish - Meat │ September 2020
Japan
Oct 26, 00:00 (GMT + 9):
Statistics │ Annual imports │ Seafood - Meat │ 2000/20
United States
Oct 25, 23:00 (GMT + 9):
Coast Guard saves sinking fishing vessel near Icy Bay, Alaska
Japan
Oct 25, 00:00 (GMT + 9):
Seafood entry | Tokyo Central Fish Market (Toyosu, Adachi, Ota) | week 42
Japan
Oct 25, 00:00 (GMT + 9):
Volumes and Prices │ Pollock roes (Tarako & Mentaiko)│ Tokyo Central Fish Market │ September-2020
Japan
Oct 25, 00:00 (GMT + 9):
Volumes and Prices │ Crabs │ Tokyo Central Fish Market │ September-2020
Peru
Oct 24, 00:10 (GMT + 9):
Anchovy fishing: they plan to start the second season at the beginning of November
European Union
Oct 23, 16:10 (GMT + 9):
The Briefing: Fishing is the latest issue to get caught up in Brexit’s net
Japan
Oct 23, 12:00 (GMT + 9):
Volume and prices │ Sendai Central Market │ September 2020
S. Georgia & S. Sandwich
Oct 23, 08:00 (GMT + 9):
South Georgia and the South Sandwich Islands (GSGSSI) Annual Stakeholder Meeting
Spain
Oct 23, 07:00 (GMT + 9):
Innovation and international synergies, keys to promoting the sustainable growth of the fishing industry



Lenguaje
FEATURED EVENTS
  
TOP STORIES
The Briefing: Fishing is the latest issue to get caught up in Brexit’s net
European Union The following is an excerpt from an article published by EuroNews: Our door remains open, no our door is open. Welcome to diplomacy in 2020; both sides in the Brexit drama have essentially ended u...
Statistics │ Exports │ Marine products │ September-2020
Norway Source: FIS.com | Click to enlarge it     [email protected] www.fis.com...
South Georgia and the South Sandwich Islands (GSGSSI) Annual Stakeholder Meeting
South Georgia & South Sandwich Is. The GSGSSI Annual Stakeholder Meeting took place on the 24th September with attendees joining virtually. Her Majesty’s Commissioner Nigel Phillips CBE, Speech to Stakeholders is given below. Th...
COVID-19 crisis: 440 foreign fishermen in isolation, 110 are due to work on Sealord boats
New Zealand Country’s biggest daily toll since spring linked to Russian and Ukrainian crew on flight WELLINGTON - A number of fishing crew who flew into New Zealand on chartered planes have the coronavirus. ...
 
Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation - Headquarters
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
AquaChile S.A. - Group Headquarters
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods, Inc
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO - Food and Agriculture Organization - Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Brim ehf (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly Marine Harvest ASA) - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart | Wal-Mart Stores, Inc. (Supermarket) - Headquarters
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2020 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER